32 CALIFORNIA MAMMALS. 



Family .Delphinidae. (Dolphins, Porpoises, etc.) 

 Teeth usually numerous in both jaws; rostral portion of 

 skull lengthened, about as long as cranium in some species, much 

 longer in others; costal cartileges ossified. 



This family includes the smaller cetaceans. Because of the 

 lack of examples in museums the genera and species of this 

 family are not well known and many changes in nomenclature 

 may be expected as better material for study is acquired. There 



ird Dolphin. 

 3. Striped Porpo 

 5. Blackflsh. 



Bay Porpoise. 

 Right Whale Porpoise. 

 Cowfish. 

 Killer. 



are fifteen or perhaps eighteen genera and probably more than 

 fifty species. Many species are pelagic, others frequent the 

 vicinity of shores, occasionally entering bays, while a few species 

 are i>eculiar to large rivers, such as the Amazon and the Ganges. 

 California gets a fair share of the marine species though several 

 are almost exterminated. 



